112 Bulletin of the Brooklyn Entomological Society Vol. XII 



15. Metopidium fiat or slightly rounded between suprahumerals when 



viewed from above bubalus Fabr. 



Metopidium feebly bisinuate when viewed from above 16. 



16. Species small, suprahumerals curving upward and backward, taurina Fh. 

 Suprahumerals only slightly recurved stimulea Van D. 



The following distributional groupings and list of food plants should 

 aid in the recognition of the species. 

 Canada — bubahis Fabr., diceros Say, basalis Walk. 



New England States — albescens Van D., bubalus Fabr., brevitylus Van D., 

 taurina Fh., constans Walk., palmeri Van D., borealis Fairm., brevis 

 Walk., brevicornis Fh., basalis Walk. 

 Atlantic and Gulf States — albescens Van D., bubalus Fabr., brevitylus Van 



D., taurina Fh., constans Walk., borealis Fairm., brevis Walk. 

 Central States — albescens Van D., bubalus Fabr., stimulea Van D., con- 

 stans Walk., militaris n. sp., palmeri Van D., borealis Fairm., brevis 

 Walk., uniformis Fairm. 

 North Central States — diceros Say, albescens Van D., bubalus Fabr., stim- 

 ulea Van D., taurina Fh., brevitylus Van D., constans Walk., basalis 

 Walk. 

 Southern States — diceros Say, albescens Van D., bubalus Fabr., borealis' 



Fairm. 

 Western States — bubalus Fabr., stimulea Van D., occidentalis Funkh., 



borealis Fairm., albido-sparsa Stal, basalis Walk, 

 Southwestern States — diceros Say, bubalus Fabr., brevitylus Van D., 

 stimulea Van D., palmeri Van D., brevis Walk., brevicornis Fh., occi- 

 dentalis Funkh., basalis Walk. , 



The known food plants of the species are here listed. Many of the 

 species are not restricted to a single or few food plants, in which case the 

 principal ones only are given. 



Alfalfa: occidentalis Funkh., bubalus Fabr. Apple: bubalus Fabr., 

 taurina Fh., borealis Fairm. Basswood : constans Walk. Cherry : bubalus 

 Fabr. Cotton : borealis Fairm. Cottonwood : bubalus Fabr. Elder : bo- 

 realis Fairm. Hickory: brevicornis Fh. Iris: borealis Fairm. Maple: 

 bubalus Fabr. Oak : brevicornis Fh., palmeri Van D., taurina Fh., diceros 

 Say. Pear : bubalus Fabr. Potato : bubalus Fabr. Quince : bubalus Fabr. 



Ceresa militaris n. sp. — Near C. palmeri Van D., but much narrower, a 

 smaller species. Much longer in proportion to its width than palmeri. 

 May be recognized by the long slender pronotum, narrow metopidium and 

 very long sharp plates of male and female. 



Bright green with brown and black markings, face yellow. Form long 

 and very slender, metopidium convex, suprahumerals long and acute, pos- 

 terior process slender and decurved; clypeus acute. Punctate, but only 

 slightly if at all pubescent. 



Head yellow-green, longitudinal striae on face ; clypeus triangular at 

 apex, tip densely pilose with white hairs; ocelli translucent with orange 



